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Endobronchial Neurilemmoma Mimicking a Bronchial Polyp
Ryoung Eun Ko,Ryoung Eun Ko,Ryoung Eun Ko,So Ri Kim,Heung Bum Lee,Yong Chul Lee,Seoung Ju Park 순천향대학교 순천향의학연구소 2015 Journal of Soonchunhyang Medical Science Vol.21 No.2
Neurilemmomas are relatively uncommon, slowly growing tumors which originate from Schwann cells. Intrathoracic neurilemmomas often occur in the chest wall and posterior mediastinum, but endobronchial neurilemmomas are exceedingly rare. These tumors in trachea or bronchus are usually detected by radiologic examinations, mostly computed tomography scan of chest. An 88-year-old man was admitted for management of pneumonia in left lower lobe and parapneumonic effusion. On bronchoscopic examination, there was a small polypoid nodule less than 1 cm in diameter mimicking an endobronchial inflammatory polyp at the bifurcation of the right anterior segmental bronchus and lateral segmental bronchus and under auto-fluorescence imaging, the nodule showed reddish brown area with defined margin. The bronchoscopic biopsy revealed that the bronchial nodule was endobronchial neurilemmoma. This is an interesting case of endobronchial neurilemmoma mimicking a bronchial polyp that is detected incidentally via bronchoscopy.
Relative Frequency of Order Statistics in Independent and Identically Distributed Random Vectors
Park, So-Ryoung,Kwon, Hyoung-Moon,Kim, Sun-Yong,Song, Iick-Ho 한국통계학회 2006 Communications for statistical applications and me Vol.13 No.2
The relative frequency of order statistics is investigated for independent and identically distributed (i.i.d.) random variables. Specifically, it is shown that the probability $Pr\{X_{[s]}=x\}$ is no less than the probability $Pr\{X_{[r]}=x\}$ at any point $x{\geqq}x_0$ when r<s, where $X_{[r]}$ denotes the r-th order statistic of an i.i.d. discrete random vector and $x_0$ depends on the population probability distribution. A similar result for i.i.d. continuous random vectors is also presented.
Park, So Ryoung,Nam, Ilku,Noh, Sanguk Hindawi Limited 2018 Security and communication networks Vol.2018 No.-
<P>An electronic warfare (EW) simulator is presented to investigate and evaluate the tracking performance of radar system under the electronic attack situations. The EW simulator has the input section in which the characteristic parameters of radar threat, radar warning receiver, jammer, electromagnetic wave propagation, and simulation scenario can be set up. During the process of simulation, the simulator displays the situations of simulation such as the received signal and its spectrum, radar scope, and angle tracking scope and also calculates the transient and root-mean-squared tracking errors of the range and angle tracking system of radar. Using the proposed EW simulator, we analyze the effect of concealment according to the noise and signal powers under the noise jamming and also analyze the effect of deception by calculating errors between the desired value and the estimated one under the deceptive jamming. Furthermore, the proposed EW simulator can be used to figure out the feature of radar threats based on the information collected from the EW receiver and also used to carry out the electronic attacks efficiently in electronic warfare.</P>
증례 : 소화기 ; 간문부 담관에서 발생한 대세포 신경내분비종양 1예
박소연 ( So Youn Park ),이상협 ( Sang Hyub Lee ),김지연 ( Ji Yeon Kim ),박주희 ( Ju Hee Park ),윤혁 ( Hyuk Yoon ),윤유석 ( Yoo Seok Yoon ),김혜령 ( Hae Ryoung Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.2S
담관의 신경내분비종양은 드물며, 그 중 대세포 신경내분 비종양은 매우 드물다. 저자들은 상복부의 둔통으로 내원하여 전산화 단층촬영에서 간문부 담관암, 내시경적 세포진 검사에서 분화도 나쁜 선암 소견으로 수술 시행 후 간문부 담관의 대세포 신경내분비암종 진단되었고, 종양의 절제 변연 침범으로 방사선 치료를 시행한 1예를 경험하여 문헌고찰과 함께 보고하는 바이다. Neuroendocrine carcinoma of the bile duct is rare, and a large cell neuroendocrine carcinoma is extremely rare. We report the first case of a large cell neuroendocrine carcinoma in the hilar bile duct. A 73-year-old woman presented with continuous dull pain in the epigastrium. We diagnosed a Klatskin`s tumor, Bismuth type II by computed tomography. An initial endoscopic cytology of the common hepatic duct showed a poorly differentiated adenocarcinoma. She underwent an extended right hepatectomy. Histologically, the tumor was diagnosed as a large cell neuroendocrine carcinoma. She received adjuvant radiotherapy for tumor involvement of the resected margin. At 12 months after surgery, lymph node metastases were present in the retroperitoneum, but she was still alive at 23 months after surgery. The role of additional therapy, such as radiotherapy, must be investigated to improve patient prognoses. (Korean J Med 2011;80:S137-S141)
확장된 깊이-우선 탐색 알고리듬을 적용한 다중표적 위치 좌표 추정 기법
박소령(So Ryoung Park),노상욱(Sanguk Noh) 한국통신학회 2013 韓國通信學會論文誌 Vol.38 No.12(융합기술)
이 논문에서는 장애물이 존재하는 환경에서 적외선 센서를 가진 다수의 감시 로봇이 획득한 정보를 융합하여 분산되어있는 표적의 위치 좌표를 추정하는 기법을 제안한다. 방위각(azimuth)과 표적을 대응시키는 방법으로는 장애물이 존재하지 않는 경우에서 제안되었던 깊이-우선(depth-first) 트리 탐색(tree search) 기법을 바탕으로, 우회 경로 탐색, 중간 단계 탐색 종료, 하위 단계 부분 탐색, 결정기준 보완 등을 추가함으로써 트리 탐색을 확장한 새로운 기법을 제시하였다. 방위각과 표적이 대응된 후에는 하나의 표적을 가리키는 방위각들에 최소 제곱 오차(least square error) 알고리듬을 적용하여 최적 교점을 구함으로써 표적의 위치 좌표를 추정한다. 제안한 위치 추정 기법의 좌표 추정 성능과 복잡도를 모의실험으로 제시하고 분석한다. This paper proposes the location estimation techniques of distributed targets with the multi-sensor data perceived through IR sensors of the military robots in consideration of obstacles. In order to match up targets with measured azimuths, to add to the depth-first search (DFS) algorithms in free-obstacle environment, we suggest the expanded DFS (EDS) algorithm including bypass path search, partial path search, middle level ending, and the supplementation of decision metric. After matching up targets with azimuths, we estimate the coordinate of each target by obtaining the intersection point of the azimuths with the least square error (LSE) algorithm. The experimental results show the error rate of estimated location, mean number of calculating nodes, and mean distance between real coordinates and estimated coordinates of the proposed algorithms.
궤양성 대장염에 동반된 Budd-Chiari 증후군 및 상장간막정맥 혈전증
박소영 ( So Young Park ),김윤재 ( Yoon Jae Kim ),박인혜 ( In Hae Park ),문창모 ( Chang Mo Moon ),최창환 ( Chang Whan Choi ),이상길 ( Sang Kil Lee ),김혜령 ( Hae Ryoung Kim ),박영년 ( Young Nyun Park ),김태일 ( Tae Il Kim ),김원호 대한소화기학회 2005 대한소화기학회지 Vol.45 No.3
Patients with inflammatory bowel disease are at increased risk for thromboembolic complications. Its prevalence rate ranges from 1% to 7% in clinical studies and reaches 39% in autopsy series. The cause of thrombotic complications in inflammatory bowel di
박소령(So Ryoung Park),송익호(Iickho Song) 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.11C
이 논문에서는, 일반 홀상관 (general odd correlation) 성질이 비동기 (asynchronous) M진 위상 신호 (M-ary phase signal) 방식에 알맞은 다상 (polyphase) 서명 수열 (signature sequence) 집합을 제안하고 상관 성질을 분석한다. 또한, 제안한 수열과 짝상관 (even correlation) 성질이 좋은 기존 다상 수열인 FZC (Frank-Zadoff-Chu) 수열, 짝상관과 홀상관이 같은 EOE (equivalent odd and even correlation) 수열을 최대 절대 상관값을 (the maximum magnitude of correlations) 사용하여 상관 성질을 견주어 본다. M진 위상 신호 방식을 사용한 직접수열 부호분할 다중접속 (direct sequence code division multiple access: DS/CDMA) 시스템에서 제안한 수열과 FZC 수열을 사용할 때를 모의 실험한 결과, 다중 경로 성분이 존재할 때 제안한 수열을 쓴 시스템 성능이 FZC 수열을 쓸 때보다 더 나음을 보인다. In this paper, we propose a class of polyphase signature sequences, whose general odd correlation properties are useful for M-ary phase signaling systems. The maximum magnitude of the general odd correlation functions of the proposed sequences are investigated and compared with those of FZC (Frank-Zadoff-Chu) sequences and those of EOE (equivalent odd and even correlation) sequences. The performance of the asynchronous M-ary phase signaling systems using the proposed sequences is simulated and compared with that using FZC sequences in direct sequence code division multiple access (DS/CDMA) systems. The performance of the system using the proposed sequence is shown to be better than that using FZC sequences when the multipath fading is in existence.